Gen7fan did you need to replace your shocks or struts when you put these on your car.
For some reason people like to debate this, I don't see any room for debate, anything lower than 1" is a YES.
I have KYB GR2 struts, and yes they were put on at the same time as the Tanabe springs. DF210's no doubt need new struts but I don't know of one strut that can take that drop, Koni, KYB, and Tokico all max at 1.5", which means there warranty is void any lower than that.
Don't get me wrong I would go for it but get the best struts you can just know that the warranty is void and that they will wear out early.
If you put those spings on stock struts get ready for a shit ride and for them to blow out in no time. Hope you have the cash for two installs because that is what you will end up doing.